NEUTRINO Multi-Version Support: Add v2.3.x & v3.1.x compatibility, fix various issues From PR#2136 and PR#2132

OpenUtau.Core/Classic/ClassicSingerLoader.cs

@@ -13,6 +13,8 @@ static USinger AdjustSingerType(Voicebank v) {
                     return new Core.DiffSinger.DiffSingerSinger(v) as USinger;
                 case USingerType.Voicevox:
                     return new Core.Voicevox.VoicevoxSinger(v) as USinger;
+                case USingerType.Neutrino:
+                    return new Core.Neutrino.NeutrinoSinger(v) as USinger;
                 default:
                     return new ClassicSinger(v) as USinger;
             }

OpenUtau.Core/Classic/VoicebankInstaller.cs

@@ -82,6 +82,7 @@ public void Install(string path, string singerType) {
                     File.WriteAllText(touch, "\n");
                     var config = new VoicebankConfig() {
                         TextFileEncoding = textEncoding.WebName,
+                        SingerType = singerType,
                     };
                     using (var stream = File.Open(touch.Replace(".txt", ".yaml"), FileMode.Create)) {
                         config.Save(stream);
@@ -129,4 +130,4 @@ static string HashPath(string path) {
             return Path.Combine(HashPath(dir), file);
         }
     }
-}
+}